"If you are hactivist or a guy who just wants to protect the freedom of information then join the cause and kill Facebook for the sake of your own privacy,"the video's narrator says in an eerie, modulator-disguised voice, which ends the video with the sign off "we are Anonymous. We are legion. Expect us." "Everything you do on Facebook stays on Facebook regardless of your privacy settings, and deleting your account is impossible."

According to the video, November 5, 2011 is the day Anonymous will allegedly launch its operation against Facebook.

"Think for a while, and prepare for a day that will go down in history," the voice in the video says (You can read the full statement on ZDNet here). "This is our world now. We exist without nationality, without religious bias. We have the right to not be surveilled, not be stalked, and not be used for profit. We have the right to not live as slaves."

Whether the message is a real threat from Anonymous remains to be seen. Security expert Eugene Kaspersky, co-founder and CEO of Kaspersky Lab, tweeted that he doubts the veracity of the message. "The news around #Anonymous to attack #Facebook on Nov 5 most probably is fake," hewrote.

Anonymous allegedly told the FBI earlier this year, ""Your threats to arrest us are meaningless to us as you cannot arrest an idea. [...] [T]here is nothing - absolutely nothing - you can possibly to do make us stop."